KR19980052590A - How to select the cable box control code type of a video cassette recorder - Google Patents

Abstract

The present invention provides a method for detecting a type of code for controlling the operation of a cable box by a video cassette recorder, comprising: determining whether a mode for detecting a type of code for controlling an operation of a cable box is set; Determining whether a code for a cable box for driving the cable box in a predetermined mode is applied when the code type detection mode is set; If a code is applied, determining whether a cable box code corresponding to a predetermined mode is stored; A code for a cable box corresponding to a predetermined mode is stored, and the step of setting a code of a kind corresponding to the code as a kind of code for controlling the cable box.

That is, in the present invention, the VCR automatically sets the type of the cord capable of controlling the cable box, thereby improving convenience of use.

Description

How to select the cable box control code type of a video cassette recorder

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video cassette recorder (hereinafter referred to as a VCR), and more particularly, to a method of selecting a cable box adjustment code of a VCR, which enables automatic specification of a cable box for receiving cable broadcasts.

The original meaning of cable television broadcasting is used to mean a system in which a TV radio transmitted wirelessly is received by wire, that is, a cable television broadcasting facility receives and distributes it to each household by wire.

In such cable television broadcasting, pay broadcasting is usually performed, and a separate scrambling method is performed for pay broadcasting.

In order to view the scrambled video signal, the video signal must be descrambled. An apparatus for this purpose is built in a device commonly referred to as a cable box. The cable box receives and descrambles a broadcast signal transmitted by wire, and modulates and outputs the descrambled signal to a frequency of a predetermined broadcast channel, thereby enabling viewing on a general television or recording using a VCR.

On the other hand, in order to record and view the video signal of the cable box using the VCR, a conventional cable box and a VCR should have a configuration as shown in FIG. 1 That is, the cable box 10 has a video signal received through the cable. Is modulated to a predetermined channel (3 or 4 channels) and applied to the VCR 20, and the VCR 20 selectively receives the video signal and the reproduced video signal of the cable box 10 received by the VCR 20. To the television 30.

In addition, the conventional cable box 10 and the VCR 20 allow the VCR 20 to drive the cable box 10 and control the reception channel for reservation recording of the VCR 20, or the like. The communication between the devices enables the VCR 20 to control the cable box 10.

However, manufacturers and models of VCRs and cable boxes are diversifying, and accordingly, types of communication codes between VCRs and cable boxes are diversifying. In accordance with this trend, the current VCR uses a method in which various types of cords according to the type of cable box are built into each type and the specification of the cable box to be used by the user is specified in the VCR.

However, the conventional method of specifying the specification of the cable box to the VCR in this way is that the number of cable boxes currently on the market reaches about 40, and the types of the cable boxes are becoming more diversified. The problem is that it becomes very difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a method of selecting a cable box control code type of a VCR, which enables to automatically determine the specifications of a cable box to which a VCR is connected and to set a code type. It is.

The cable box adjustment code type selection method of the VCR according to the present invention is a method in which a video cassette recorder detects a type of code for controlling the operation of a cable box, and a mode for detecting a type of code for controlling the operation of a cable box. Determining whether is set; Determining whether a code for a cable box for driving the cable box in a predetermined mode is applied when the code type detection mode is set; If a code is applied, determining whether a cable box code corresponding to a predetermined mode is stored; A code for a cable box corresponding to a predetermined mode is stored, and the step of setting a code of a kind corresponding to the code as a kind of code for controlling the cable box.

1 is a diagram showing a connection state between a conventional cable box, a video cassette recorder and a television;

2 is a block diagram of a video cassette recorder for performing a method for selecting a cable box adjustment code type according to the present invention;

3 is a flowchart of a method for selecting a cable box control code type of a video cassette recorder according to the present invention;

<Description of the code | symbol about the principal part of drawing>

10 cable box 20 video cassette recorder

21: Tuner 22: Micom

23: recording processing system 24: modulator

25: Deck 26: Regeneration Treatment System

27: key matrix 28: OSD unit

29 synchronization detection unit 30 TV

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a VCR for carrying out the method of selecting a cable box adjustment code type of a VCR according to the present invention, and the VCR 20 is connected to the cable box 10.

As shown in the cable box 10, a tuner 11 for receiving signals of multiple channels transmitted by wires and a microcomputer 12 for controlling a reception channel of the tuner 11 are provided. At this time, the receiving unit 13 is connected to the microcomputer 12, and the receiving unit 13 is configured to receive a key code applied from the remote controller 14 and apply it to the microcomputer 12. On the other hand, the microcomputer 12 is configured to control the drive of the cable box 10 in response to a key signal applied from the microcomputer 22 of the receiver 13 and the VCR 20 described later.

A scrambler 15 is connected to the tuner 11, and the scrambler 15 is configured to descramble a signal received by the tuner 11, that is, a scrambled signal, and apply it to the modulator 16.

The modulator 16 is configured to modulate and output a signal from the scrambler 15 into a signal of a predetermined band, for example, 3 or 4 channels.

The image signal of the cable box 10 is applied to the tuner 21 of the VCR 20 through the image output line L, and the tuner 21 is configured to receive signals of other predetermined channels under the control of the microcomputer 22. Consists of. Here, in order to receive the video signal of the cable box 10, the tuner 21 should be set to three or four channels.

The video signal of the tuner 21 is applied to the recording processing system 23 and the modulator 24, and the recording processing system 23 processes the video signal to be recorded on the magnetic tape and applies it to the deck 25. .

The deck 25 is driven in the recording mode and the reproducing mode under the control of the microcomputer 22. In the recording mode, the deck 25 records the image signal processed by the recording processing system 23 on the magnetic tape. The video signal recorded on the tape is read and applied to the reproduction processing system 26.

The reproduction processing system 26 reproduces the image signal applied from the deck 25 so as to be displayed on a monitor and applies the same to the OSD unit 28, and the OSD unit 28 is controlled by the microcomputer 22. It is configured to mix a predetermined OSD signal with the video signal of the reproduction processing system 26 and apply it to the modulator 24.

The modulator 24 is configured to apply the video signal of the tuner 21 or the reproduction processing system 26 to the tuner of the television under the control of the microcomputer 22.

Meanwhile, the receiving unit 27 is connected to the microcomputer 22 of the present invention, and the receiving unit 27 is configured to receive a key code from the remote controller 29 and apply it to the microcomputer 22. That is, the remote controller 29 is configured with various keys for controlling the driving of the VCR, and is configured to wirelessly transmit a key code corresponding to the driven key among these keys to the receiver 27 wirelessly.

The receiver 27 applies the received key code to the microcomputer 22, and the microcomputer 22 controls the driving of the tuner 21, the deck 25, and the modulator 24 in response to the key code.

At this time, the microcomputer 22 of the present invention stores codes of a plurality of cable boxes having different specifications (in order to control the driving of the cable box 10), and the line L among the various types of key codes. It is possible to control the drive of the cable box 10 by setting the type according to the specifications of the cable box 10 connected through.

To this end, although the user manually inputs the type of cord that meets the specifications of the cable box 10 into the VCR 20, this process may be automatically performed in the present invention as described below.

3 shows a flow diagram for the microcomputer 22 to perform the method according to the invention.

As shown, the microcomputer 22 has a mode in which the mode set by the key matrix 27 detects the specification of the cable box 10, that is, a type of code for controlling the operation of the cable box 10. It is determined whether it is set (step 31).

If the code type detection mode (this mode can be set by the VCR remote control unit 27) is set as a result of the determination in step 31, the microcomputer 22 determines whether a predetermined code signal is applied from the receiving unit 27. Judgment (step 22).

At this time, the user drives the power-on key of the keys of the remote control unit 14 for the cable box 10 so that the code of the remote control unit 14 can be received by the receiving unit 27 of the VCR 20.

As a result of the determination in step 32, if a predetermined key code is applied from the receiver 27, it is determined whether the cable box code corresponding to the type of the code signal is stored. If it is not stored, the process goes to step 37 (step 33).

In step 34, the microcomputer 22 determines whether the input key code of the predetermined specification is a code for commanding power-on of the cable box 10, and proceeds to step 35 when it is a code for commanding power-on. When it is not the code for commanding the power on, the process proceeds to step 37.

In step 35, the microcomputer 22 determines that the cable box 10 having the specification according to the specification of the code applied to the receiving unit 27 is connected, and drives the cable box 10 of the determined type of code. Set to the code type of the specification to control.

In addition, the microcomputer 22 proceeds to step 26 to cause the OSD unit 28 to output an OSD signal indicating that a code conforming to the specification of the cable box 10 is detected, and all processes are terminated. .

However, if the code of the stored specification is not applied as a result of the above-described determination of steps 33 and 34, or if the applied code is not a power-on code, codes of a kind corresponding to the received code signal are not stored. In other words, the OSD unit 28 outputs an OSD character indicating that codes of a specification corresponding to the received code are not stored and ends all processes.

That is, in the present invention, when the cable box code of all possible specifications is stored in the microcomputer 22 in the VCR, and a predetermined key code for controlling the drive of the cable box is applied, the type of the applied key code is discriminated and determined. It is a kind of code that controls the operation of the cable box. Therefore, the general user only needs to drive a predetermined key of the remote control of the cable box, and the type of code for controlling the cable box can be automatically set in the VCR.

As described above, in the present invention, the VCR automatically sets the type of the cord capable of controlling the cable box, thereby improving convenience of use.

Claims (3)

As a method in which the video cassette recorder 20 detects a kind of code for controlling the drive of the cable box 10, Determining (31) whether a mode for detecting a type of code for controlling an operation of the cable box (10) is set; Determining (32) whether a code for the cable box (10) for driving the cable box (10) is applied when the code type detection mode is set as a result of the determination in the step (31); Determining whether the code for the cable box corresponding to the predetermined mode is stored when the code is applied (33, 34); The code for the cable box 10 corresponding to the predetermined mode is stored, and the step 35 of setting a code of the kind corresponding to the code as a kind of code for controlling the cable box 10 is provided. How to select the cable box control code type of the video cassette recorder. The method of claim 1, wherein the predetermined mode is a power off mode. The method according to claim 1, further comprising the steps (36, 37) of indicating whether or not the code for the cable box (10) corresponding to the predetermined mode is stored. .